Valve device.



G. KROESCHELL.

VALVE D EVIGB. APPLIOATION FILED MAY 28,1908.

91 3,960.' Patented Mar. .2, 1909.

CHARLES KROESOHELL, OF CHICAGO, ILLINOIS, ASSIGNOR TO KROESCHELLBROTHERS FOMIANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

VALVE DEVICE.

f Specification of Letters Fatent.

Patented March 2, 1909.

Application led May 28, 1908. Serial No. 435,420.

T o all whom it 'may concern:

4 cases of emergency, to be quic Be it known that I, CHARLES KRoEsoHELL,a citizen of the United States, residing at Chicago, inthe county ofCook and State of Illinois, have invented a new and useful Imrovement inValve Devices, of which the' iollowing is a speciiication.

The object ol my invention is to so adapt the differential screw forworking the rotatable stein of a valve-device as to enable the valve,especially when of lar e size and in ily brought to its seat tobethereafter tightened against the same for closure of the valve under aslower action of the screw, or loosened upon its seat by such slowaction preparatory to being quickly opened. i

In the accompanying drawing, Figure 1 is a view of my improvedvalve-device in partly brokenand sectional elevation, and Fig. 2 showsthe threaded sleeve of the differential screw by a view in elevation,v

'The valve-casing 3 containing the seat 4 for the valve 5 and providedwith a stuffingbox 6 through which the stein works, may be of usual orany desired construction. Ayoke 7 extends from the casing and isprovided in its crown-portion with a bearing 8 coarsely threadedinternally. The valve-stein 9,which )asses through the yoke-crown andcarries a hand-wheel 10 on its outer end, is provided with afinely-threaded reduced section 11 working in a sleeve 12 which iscorrespondingly threaded internally and formed with a coarse externalscrew-thread 13 corres onding to that in the bearing 8 in whic thesleeve works. n

The 'feature of my invention is an adequately stiil' coiled spring 14confined endwise about the stein 9 between the wheel 10 and a .ljaceiitend of'tlie sleeve to bind the. latter to the threaded section of thestein with sufficient force to cause the sleeve to -turn with the steinin operating it to bring valve upon its seat after bringing it thereto,or loosening it u on its seat withdrawing it tilierefrom. n turning thestem to close the valve, therefore, the yielding .union produced by thespring of the sleeve and stem-section 13 causes the coarse the latterstationary, to effect tightening of the valve. In the reverse turning ofthe stern to open the valve, the initial resistance to opening thelatter overcomes the union due to the spring-pressure, and causes thefine thread oii the stein to work in the sleeve until the valve isloosened from its seat, after which the resistance to withdrawing thevalve reparatory to I thread ofthe sleeve to quickly advance the j valveagainst its seat until the resistance to tightly seating the valveovercomes the spring-pressure, when further turning of the Astern willactuate it inside the sleevefleaving for fully opening it will be so larlessened as to be inferior to the aforesaid unitin` pressure of thespring and cause continued ing of the stem to turn with it'tlie sleeveand work its coarse exterior thread in the bearing l8 to quickly openthe valve.

I claim:

A valve-device comprising, in combination, a casing containing avalve-seat and g rovided with an exterior sleeve-bearing having aninternal coarse screw-thread, a valve in the casing provided with arotatable stem havinor a reduced section with a line screwthread upon itand extending through said bearing, a handle on the outer end of the"stem, la sleeve about said reduced stem-section havin a fine internalscrewthreaden gaging Wit A that on the stein and a coarse externalscrew-thread Working in said bearing, and a, coiled s ring confinedabout the stern between sai wheel and sleeve and forming a yieldingunion between the stem and sleeve, for the purpose set forth.

CHARLES KROESOHELL.

In presence of RALPH SCHAEFER, CRAs. E. GAYLORD.

turn-

